WI-162
Engine Electrical System
WIRING SYSTEM
19.Engine Electrical System
A: WIRING DIAGRAM
1. ENGINE TYPE FA (WITHOUT PUSH BUTTON START)
WI-44362
8
7
D
N
R
P
9
10
A24
C11
C4
C12
B48
B47
B21
B32
B5
A16
A28
C9
B15
B39
B27
B16
C3
B34
B33
B12
B11
B10
B22
B24
B23
B36
B35
A25
A7
A1
B43
A9
A10
B42
C27
B20
B8
A43
A20
A6
A37
11
12
13
OFF ACC
ON ST
4
5
2
1
3
6
A26
A32
A14
A33
A8
B37
B1
A23
A34
A44
A40
M/B
A36
A48
A11
A39
A38
A12
SBF-5
SBF-7
ECM
SBF-6
SBF-8
M/B
M/B
MT
CVT
CVT
MT
MT
MT
CVT
CVT
MT
MTCVT
CVT
CVT
MT
MT
CAN COMMUNICATION
STARTER MOTOR
FUEL PUMP
ASSY
(FUEL
PUMP)
BRAKE PUMP
RELAY
FUEL PUMP
RELAY
FUEL PUMP CU
F/B FUSE No. 12
GENERATOR
M/B FUSE No. 13
FUSE HOLDER
FUSE HOLDER
IG RELAY
MAIN
RELAY
FUSE HOLDER
FUSE HOLDER
A/F, OXYGEN
SENSOR RELAY
INHIBITOR
SWITCH
STARTER
RELAY 1
CLUTCH
START
SWITCH
ELECTRONIC
THROTTLE
CONTROL
RELAY
IG 2
RELAY
MAIN SBF
M/B FUSE No. 11
FUEL GAUGE SYSTEM
IGNITION SWITCH
FUEL INJECTOR No. 4
FUEL INJECTOR No. 3
FUEL INJECTOR No. 2
FUEL INJECTOR No. 1
PURGE CONTROL SOLENOID VALVE 2
EXHAUST CAMSHAFT POSITION SENSOR RH
EXHAUST CAMSHAFT POSITION SENSOR LH
INTAKE CAMSHAFT POSITION SENSOR RH
CRUISE CONTROL SWITCH
STOP LIGHT & BRAKE SWITCH
BODY INTEGRATED UNIT
(
IMMOBILIZER
)
MAIN FAN RELAY 1
A/C RELAY
PRESSURE SWITCH
SUB FAN RELAY
WASTEGATE CONTROL SOLENOID VALVE
HIGH PRESSURE FUEL PUMP
PURGE CONTROL SOLENOID VALVE 1
INTAKE CAMSHAFT POSITION SENSOR LH
FRONT OXYGEN (A/F) SENSOR
REAR OXYGEN SENSOR
MASS AIR FLOW & INTAKE AIR TEMPERATURE SENSOR
FUEL
INJECTOR
RELAY
F/B FUSE No. 21
BATTERY
F/B FUSE No. 2
F/B FUSE No. 7
F/B FUSE No. 4
CLUTCH SWITCH
NEUTRAL
POSITION
SWITCH 1
15WRX_STI_US_EN.book 162 ージ 20  
WI-163
Engine Electrical System
WIRING SYSTEM
WI-44363
10
11
12
13
9
8
7
3
4
C8
B44
C16
C24
C32
B13
B3
B45
A29
A31
A30
A18
A19
A17
J/C
B18
C2
B17
B29
C1
B30
B25
B4
C15
C7
C23
C31
B38
B41
B40
C14
C30
B26
B14
C29
B19
B31
C22
C6
A35
C17
A47
C10
C18
C25
B2
5
6
2
1
ELCM
C13
C5
C21
B6
C19
C26
A27
A3
A15
TFT
I/F
ECM
I/F
MT
SWITCHING VALVE
PRESSURE SENSOR
VACUUM PUMP
BRAKE BOOSTER PRESSURE SENSOR
BATTERY
SENSOR
OIL LEVEL
SWITCH
POWER SUPPLY CIRCUIT
DRIVE CIRCUIT
SPEAKER
CAN
COMMUNI-
CATION
SATELLITE
SWITCH
(SI-DRIVE)
DRIVE CIRCUIT
MALFUNCTION
MICRO COMPUTER
OIL PRESSURE
TACHOM-
ETER
ENGINE
COOLANT
TEMP.
GAUGE
CAN TRANSCEIVER &
RECEIVER
COMBINATION METER
OIL PRESSURE
SWITCH
ENGINE GROUND
CAN
COMMUNICATION
CRUISE CONTROL
SWITCH
DATA LINK CONNECTOR
EGR CONTROL VALVE
FUEL PRESSURE SENSOR
ENGINE OIL TEMPERATURE SENSOR
EXHAUST OIL CONTROL SOLENOID RH
EXHAUST OIL CONTROL SOLENOID LH
INTAKE OIL CONTROL SOLENOID RH
INTAKE OIL CONTROL SOLENOID LH
ENGINE COOLANT TEMPERATURE SENSOR
MANIFOLD ABSOLUTE PRESSURE &
INTAKE AIR TEMPERATURE SENSOR
ELECTRONIC THROTTLE CONTROL
IGNITION COIL
No. 4
IGNITION COIL
No. 3
IGNITION COIL
No. 1
IGNITION COIL
No. 2
ACCELERATOR
PEDAL POSITION
SENSOR
KNOCK SENSOR RH
KNOCK SENSOR LH
TUMBLE GENERATOR VALVE ACTUATOR RH
TUMBLE GENERATOR VALVE ACTUATOR LH
CRANKSHAFT POSITION SENSOR
DELIVERY
MODE FUSE
15WRX_STI_US_EN.book 163 ージ 20  
WI-164
Engine Electrical System
WIRING SYSTEM
WI-44364
1a 1a
B220
B134A:
E158B:
A
B
G/R
W/G
B/O
G/R
3
5
G/R
B
R/B
R/B
W/G
1
2
R/G
A25
B/R A37
A32
L/O
A1
Y/B
A7
Y/L
L/R
B8
A6
A43
A20W
Y
A26B/O
G/B
B43
ECM
REF. TO IMMOBILIZER SYSTEM [1a]
ALT-2
GENERATOR
FB-38
F/B FUSE NO. 12
(IG)
MB-25
M/B FUSE NO. 11
(B)
REF. TO RADIATOR FAN SYSTEM [1a]
FUEL PUMP RELAY
REF. TO CRUISE CONTROL SYSTEM [1b]
REF. TO GND [d]
REF. TO AIR CONDITIONING SYSTEM
[a]
15WRX_STI_US_EN.book 164 ージ 20  
WI-165
Engine Electrical System
WIRING SYSTEM
WI-44365
1b 1b
6
7
5
B134A:
R122
R1
B97
R58
R/B
3
4
1
2
L
G/Y
G/R
B/R
5
G/R
1
R/B
2
G
3
LG/R
4
B
6
G/Y
A
B
R/B
R/B
G
W/L
LG/R
LG/R
A44
LG/R
A40
W/L
ECM
FUEL LEVEL SENSOR
FUEL PUMP
FUEL PUMP ASSY
REF. TO GND [g]
FUEL PUMP CU
REF. TO FUEL GAUGE SYSTEM [a]
15WRX_STI_US_EN.book 165 ージ 20  
WI-166
Engine Electrical System
WIRING SYSTEM
WI-44366
i231
B553
1c 1c
B22
E3
i10
i229
B551
E11
85
3
B
BR/W20
W/LW/L
40
L32
GR 31
R33
38B
B
G
1
G/O 3G/O
I/F
TFT
GR
I/F
SPEAKER
DRIVE CIRCUIT
OIL PRESSURE
CAN TRANSCEIVER &
RECEIVER
MICRO COMPUTER
MALFUNCTION
DRIVE CIRCUIT
POWER SUPPLY
CIRCUIT
OIL PRESSURE SWITCH
FB-18
F/B FUSE NO. 7
(B)
FB-12
F/B FUSE NO. 2
(IG)
TACHOM-
ETER
ENGINE
COOLANT
TEMP.
GAUGE
COMBINATION METER
REF. TO GND [e]
REF. TO CAN COMMUNICATION SYSTEM [b]
15WRX_STI_US_EN.book 166 ージ 20  
WI-167
Engine Electrical System
WIRING SYSTEM
WI-44367
1d 1d
5
6
2
3
1
B68 ST1
i229 B551
ST3
GR
B
B
S/I
S#/I
B/W
B/W
V
11
10
7
8
V
B
GR
GR
GR
ROLL CONNECTOR
SATELLITE SWITCH
(SI-DRIVE)
REF. TO GND [b]
REF. TO CLEARANCE LIGHT &
ILLUMINATION LIGHT SYSTEM [1a]
15WRX_STI_US_EN.book 167 ージ 20  
WI-168
Engine Electrical System
WIRING SYSTEM
WI-44368
1e 1e
B14
B550
T7
PRND
A:
B134
T3
B12
12
11
2
3
5
1
B/W
W/B
RA10
A33 R/W
W/R
W/R
A8 B/W
W/B
22
8
21
7
B/LA14
LA9
6B/Y
B/Y
9B/W
B/W
W/R
W/BW/B
1
B225
W/L
W/L 1
LG 2
W/L
B/W
B/L
ST-2
IG SW
(ST)
ECM
*
1
*
4
*
1
*
3
*
2
*
2
*
3
*
4
B106
MT
W/B
MT
G/B B/R
MT
CVT
CVT
CVT
CVT
CVT
CVT
CVT
CVT
MT
T2 B25B25 T2
MT MT
21
C
ST-1
F/B FUSE NO. 21
(ST)
REF. TO CAN COMMUNICATION SYSTEM [a]
BATTERY
STARTER RELAY 1
STARTER MOTOR
FUSE HOLDER
NEUTRAL
POSITION
SWITCH 1
INHIBITOR SWITCH
: MT MODEL : W/B
CVT MODEL : W/R
: MT MODEL : G/B
CVT MODEL : R/W
: MT MODEL : W/B
CVT MODEL : B/W
: MT MODEL : LG
CVT MODEL : W/L
CLUTCH
START
SWITCH
10A
10A
15WRX_STI_US_EN.book 168 ージ 20  
WI-169
Engine Electrical System
WIRING SYSTEM
WI-44369
1f 1f
B550
B220
B220
B225
B225
A:
B134
15A
15A
D
B564
F27
W/R
W/L
15 W
R18
W/Y
12
13
LG
Y/L
10
11
20
18LG
B/O
22
21
R/L
B/O
L/B
G
Y/L 16
17
14
L
3 W/L
15
16 G/L
W
R
G/L
W
R
G/L 8
9LG
L/B 6
7
E
L17
W/RA36
W/RA48
LGA38
Y/L
A12 Y/L
A24
GA11
R/LA39
15A
15A
2 W/R
4 W/Y W/Y
W/BW/B
W/B 11
B9
C4 BR
E7 W
D4
7
6
9LG
W/R 12
13
Y/L
Y/L
F
G
Y/L
H
Y/L
I
MB-23
SBF-7
(B)
MB-24
SBF-7
(B)
MB-22
SBF-5
(B)
ECM
C: F35
B: B143
E: F36
D: B144
FUEL INJECTOR RELAY
ELECTRONIC THROTTLE
CONTROL RELAY
A/F, OXYGEN
SENSOR RELAY
MAIN RELAY
IG RELAY
FUSE HOLDER
20A
M/B
RELAY HOLDER
15WRX_STI_US_EN.book 169 ージ 20  
WI-170
Engine Electrical System
WIRING SYSTEM
WI-44370
1g 1g
10
12
13
8
F27
B40
A:
B134
E158
B:
B:
F109
C:
B360
J
5
8
7
2
B9
6
1
2
2
1
I
B22 E3
B564
B45
W
G/YG/Y
B3Y/L
C2
B20 B/Y
C10
B6
B/R B/R
P8
9
R6
B/Y4
B/R5
L14
W16
G/Y8
Y/L
R/L
SB
1W
W/B
B/Y
B/W B1
W/R
B564
B107
G
30A
G
Y/L
B/R
B/R
W/B
L/B B37
BR/Y
R/L
SB
PP
P
A23W
A34R/Y
B/Y
ECM
W
MT
MT
C
MT
MT
BRAKE PUMP RELAY
REF. TO GND [c]
BRAKE PUMP FUSE
CLUTCH SWITCH
BATTERY SENSOR
REF. TO CAN COMMUNICATION
SYSTEM [b]
DATA LINK
CONNECTOR
MB-27
M/B FUSE NO. 13
(B)
FB-32
F/B FUSE NO. 4
(IG)
DELIVERY MODE FUSE
THROUGH JOINT
CONNECTOR
MB-33
MAIN SBF
(B)
15WRX_STI_US_EN.book 170 ージ 20  
WI-171
Engine Electrical System
WIRING SYSTEM
WI-44371
1h 1h
E158
B:
B134
A:
B315
B122
B3
B565
9
6
8
1
4
3
7
11
3
4
5
1
6
2
J/C
*
1
*
1
*
1
*
1
*
1
*
1
*
1
5
3
2
4
1
H
*
1
E3 B22
B97 R1
R400
18
5
17
20
15
16
19
E3 B22
O
A29
O
Y/L
G/BA30
G/B
L
A31
L
L/YA18
L/Y
R/L
A17
R/L
G/Y
G/Y
S
G/B
G/R
G/W
G
S
G
W/L
B/L
Y/G
Y/L
G/RA19
Y/BB13
G/W
1
R
2
L/Y
3
W/L
A16
B/L
A28
G/Y
B5
G/Y
Y/G
BR/W
W/L
Y/G
BR/W
L/Y
G/B
BR/W
A27
ELCM
Y/LY/L
LGA3
L/O
GR
Y/L
L/O
LG
L/O
A15
R
ECM
SWITCHING
VALVE
PRESSURE
SENSOR
VACUUM PUMP
: TERMINAL No. OPTIONAL ARRANGEMENT
BRAKE BOOSTER
PRESSURE SENSOR
MASS
AIR FLOW &
INTAKE AIR
TEMPERATURE
SENSOR
ACCELERATOR
PEDAL
POSITION
SENSOR
15WRX_STI_US_EN.book 171 ージ 20  
WI-172
Engine Electrical System
WIRING SYSTEM
E158
B:
E159
C:
E10
WI-44372
1i 1i
4
E64
E75
F
E162
E124
E48
E14
K
L
N
M
B22 E3
Y/L R1
R1
L/W 2
O2
B/Y 1
L/WC11
W/B 2
W/BB19
OB2
Y3YB31
B/Y 1
L/W 2
B/L 3
B/Y 2
G/B 1
BR/R 3
B/L 4
W2
B/Y 1
WB26
B2
B/Y 1
BB14
L/WB6
G/BB25
BR/RB4
B/LC19
R
B/R
B/L
B/Y
Y/L R
ECM
KNOCK SENSOR
RH
KNOCK SENSOR
LH
ENGINE OIL
TEMPERATURE
SENSOR
MANIFOLD
ABSOLUTE
PRESSURE &
INTAKE AIR
TEMPERATURE
SENSOR
FUEL PRESSURE
SENSOR
WASTEGATE
CONTROL
SOLENOID VALVE
CRANKSHAFT
POSITION
SENSOR
15WRX_STI_US_EN.book 172 ージ 20  
WI-173
Engine Electrical System
WIRING SYSTEM
WI-44373
1j 1j
E158
B:
E159
C:
E18
E57
K
M
O
E8
E4
E52
Q
P
E130
B44
R R5
R2
O6
L/Y 4
R/Y 3
GR 1
R5
GR 2
W6
O3
L1
P
R
GR
W
O
L
P 4
C1
B18
C2
B30
B17
B29
GRB38
Y/GC4
Y/BC12
OC29
L/YC13
R/YC5
GRC21
B/Y
B/R
B/Y 1
GR 2
B/Y
R1
Y/G 2
R1
Y/B 2
R
W1
W
ECM
OIL LEVEL SWITCH
PURGE CONTROL
SOLENOID
VALVE 2
PURGE CONTROL
SOLENOID
VALVE 1
ENGINE
COOLANT
TEMPERATURE
SENSOR
ELECTRONIC
THROTTLE
CONTROL
EGR CONTROL
VALVE
15WRX_STI_US_EN.book 173 ージ 20  
WI-174
Engine Electrical System
WIRING SYSTEM
WI-44374
1k 1k
E159
C:
E158
B:
1
E24
E3B22
R
D
O
Q
E25
E5
E16
E6
E17
E160
G/WC9
L/YB12
L/BB11
R/LB15
G
R
B39
B27
R4
W3
G
W
B/O
5
G/W 2
R/L 1
L/Y 1
L/B 2
GC3
YB16
BR
B/R
BR
B/Y
B42 3
C27
W1
G2
Y4
WB24
RB23
W1
R2
L/YB36
L/BB35
L/Y 1
L/B 2
WB48
RB47
W1
R2
LB10
PB22
L1
P2
B/O
B/R
B/Y
L
B/R
B/Y
ECM
B/R
B/R
B/R
GE-2
HIGH PRESSURE
FUEL PUMP
FUEL INJECTOR
No. 4
FUEL INJECTOR
No. 3
FUEL INJECTOR
No. 2
FUEL INJECTOR
No. 1
REAR OXYGEN
SENSOR
FRONT OXYGEN
(A/F) SENSOR
15WRX_STI_US_EN.book 174 ージ 20  
WI-175
Engine Electrical System
WIRING SYSTEM
E158
B:
E159
C:
WI-44375
1l 1l
E55
E51
R
N
P
E35
E36
E65
E62
B/Y
B/L 3
B/Y 2
W/R 1
W/L 4
R/L 5
B/Y 2
B/L 3
Y/R 1
Y/L 4
P/L 5
W/R
W/L
R/L
B40
P/LC6
Y/LC22
Y/RB41
C14
C30
G/RB21
L/WB34
B/L
R
R1
L/W 3
G/R 2
G/WB20
R1
L/W 3
G/W 2
Y/GB33
R1
L/W 3
Y/G 2
Y/LB32
R1
L/W 3
Y/L 2
ECM
EXHAUST CAMSHAFT
POSITION SENSOR LH
EXHAUST CAMSHAFT
POSITION SENSOR RH
INTAKE CAMSHAFT
POSITION SENSOR RH
INTAKE CAMSHAFT
POSITION SENSOR LH
TUMBLE GENERATOR
VALVE ACTUATOR LH
TUMBLE GENERATOR
VALVE ACTUATOR RH
15WRX_STI_US_EN.book 175 ージ 20  
WI-176
Engine Electrical System
WIRING SYSTEM
E159
C:
3
2
WI-44376
1m 1m
E37
E
E38
E66
E63
G
E34
E33
E32
E31
B22 E3
B1
L/W 2L/WC15
L/B
B1
G/W 2G/WC7
B1
W2
WC31
B1
BR/R 2
BR/RC23
Y/L
BR/W 1
L/Y 2
W3
L/YC8
BR/W 1
G/Y 2
W3
G/YC16
BR/W 1
BR/Y 2
W3
BR/YC24
BR/W 1
Y2
W3
YC32
W
W
W
W
L/B BR/W
Y/L B
ECM
GE-2
IGNITION COIL
No. 1
IGNITION COIL
No. 2
IGNITION COIL
No. 3
IGNITION COIL
No. 4
EXHAUST OIL
CONTROL
SOLENOID RH
EXHAUST OIL
CONTROL
SOLENOID LH
INTAKE OIL
CONTROL
SOLENOID RH
INTAKE OIL
CONTROL
SOLENOID LH
15WRX_STI_US_EN.book 176 ージ 20  
WI-177
Engine Electrical System
WIRING SYSTEM
WI-44377
C:
E159
A:
B134
15
16
1n 1n
J
B22
E3
B
B/Y
B/Y
B
B
B
B
B
B
B
B/R
B/L
B
B
C25
C18
C17
A47
A35
C10
C26
B/R
B/R
B/R
B/L
ECM
GE-1
REF. TO CRUISE CONTROL SYSTEM [1b]
15WRX_STI_US_EN.book 177 ージ 20  
WI-178
Engine Electrical System
WIRING SYSTEM
LIST OF CONNECTORS
FUSE HOLDER
RELAY HOLDER
1o 1o
123
4
5
5
9
1
6
10
2
7
11
3
8
12
4
1
12
3
4
5678
9
10 11 12
1413 15 16
12
1
9
8
16
2
10
7
15
3
11
6
14
4
12
5
13
3
42
156
7
13 1411
12
9
10
8
89
19 20
1234 567
10 11 12 13 14 15 16 17 18
2
1
12
34
2
1
78
5
6
10
11 12
23 24
35 36
47 48
3
5
6
7894
12
45
4643 4441 4239 4037 38
21
2219 2017 1815 1613 14
33
3431 3229 3027 2825 26
1
5
76
2
8
34
9
10 11
12
13
14 15
16
18
19 21 22
20
17
24
5
3
17
9
8
6
32 33
34
35
28262423
25
27
29
30
31
36 37
38
40
41 43 44
42
39
56341
2
123 4567
89
10 11 12 13 14 15 16
91
2
232221 262524201918
4
13
12
17
3
16
6
15
587
14
10 11
3
4
12
9
5
7
8
6
10
12
13
11
14
16
17
15
123
12
12
1
2
213
3
1
2
645
12
34
3
12
213
12
45
213
12
123456
(B)
B9
12
WI-44378
B22
(BR)
B25
(BR)
B220 B225
B40
(B)
B97
B3
(B)
B315
(B)
B550
(B)
B360
C:
(GR)
(B)(B)
E48
(B)
E75
E8
(B)
E14
(
L
)
E4
B68
B12
(B)
B122
(GR)
B106
B107
(L)
B134A:
(BR)
B144D:
(BR)
B143B:
(
GR
)
E18
E36
E35
(GR)
(GR)
(GR)
E65
E62
(GR)
(
B
)
(
B
)
E38
E66
E37
E63
(B)
(
GR
)
E51
E55
(
GR
)
(
GR
)
B14
(B)
(
GR
)
(
GR
)
E6
E5
E17
E16
(GR)
(GR)
(G)
E25
(B)
(B)
E64
E52
(B)
E57
(B)
E10
(B)
(B)
(B)
(B)
E34
E33
E32
E31
B564
B565
(B)
RELAY HOLDER
E24
(B)
1
3
2
465
E124
(B)
1234
15WRX_STI_US_EN.book 178 ージ 20  
WI-179
Engine Electrical System
WIRING SYSTEM
LIST OF CONNECTORS
1p 1p
79
10
85
23
11 12
6
19 21 222017
24
35 36
47 48
18
31 33 343229 30
43 45 464441 42
3412
15 1613 14
27 2825 26
39 4037 38
5
7
8
6
3
9
12
4
13
15
16
14
11
10
17 18
25 26
12
21
23
24
22
19 20
29
31
32
30
27 28
12
24
23
25
12 13 14
15
16
26
2221
20
19
1817
10 11
2
4
5
13
7698
3412 89
10 11
12 13 14 15 16 17 18 19 20 21 22 23 24
567
11 12
9
10
7856341
2
15 1613 14 19
18
20
21 22 23 24 26
25
27 28 29 30 31 32 33 34 35 36 37 38 39 40
17
43
1
2
63451
2
1234
5678
1
78
69
2345
2
1
89
5
12
6
7
34
1110
WI-44379
i10
F27
F109
B:
R58
T7
(B)
(GR)
C:
E159
(B)
B:
E158
(B)
E160
R122
R400
ST3
E130
1
E162
(B)
213
12
3
45
6789
10 11 12
F35
(L)
C:
F36E:
12 3
4567
i231
12345 6789
10 11 12 13 14 15 16 17 18 19 20
i229
12 345
6789
10 11 12
RELAY HOLDER
15WRX_STI_US_EN.book 179 ージ 20  
WI-180
Engine Electrical System
WIRING SYSTEM
2. ENGINE TYPE FA (WITH PUSH BUTTON START)
WI-44380
9
8
7
D
N
R
P
10
11
A24
C11
C4
C12
B48
B47
B21
B32
B5
A16
A28
C9
B15
B39
B27
B16
C3
B34
B33
B12
B11
B10
B22
B24
B23
B36
B35
A25
A7
A1
A9
A10
B42
B20
B8
A43
A20
A6
A37
12
4
5
2
1
3
6
A33
A8
A26
A14
A13
A34
A32
A23
B1
B37
A44
A40
M/B
M/B
M/B
A36
A48
A11
A39
A38
A12
SBF-5
ECM
SBF-6
SBF-8
SBF-7
MT
MT
CVT
CVT
CVT
CVT
MT
MT
MT
CVT
MT
MT
CVT
MTCVT
BRAKE
PUMP
RELAY
FUSE HOLDER
FUSE HOLDER
CAN COMMUNICATION
STARTER MOTOR
FUEL GAUGE SYSTEM
FUEL PUMP
ASSY
(FUEL
PUMP)
FUEL PUMP
RELAY
FUEL PUMP CU
KEYLESS ACCESS CM
IG RELAY 1
(PUSH BUTTON START)
F/B FUSE
No. 12
GENERATOR
F/B FUSE No. 26
M/B FUSE No. 13
IG RELAY
MAIN RELAY
FUSE HOLDER
FUSE HOLDER
A/F, OXYGEN
SENSOR RELAY
INHIBITOR
SWITCH
NEUTRAL
POSITION
SWITCH 1
FUSE
HOLDER
STARTER RELAY
(PUSH BUTTON START)
STARTER
CUT RELAY
CLUTCH START
SWITCH
CLUTCH
SWITCH
STARTER
RELAY 1
ELECTRONIC
THROTTLE
CONTROL
RELAY
IG2 RELAY
MAIN
SBF
M/B FUSE No. 11
FUEL INJECTOR No. 4
FUEL INJECTOR No. 3
FUEL INJECTOR No. 2
FUEL INJECTOR No. 1
PURGE CONTROL SOLENOID VALVE 2
EXHAUST CAMSHAFT POSITION SENSOR RH
EXHAUST CAMSHAFT POSITION SENSOR LH
INTAKE CAMSHAFT POSITION SENSOR RH
CRUISE CONTROL SWITCH
STOP LIGHT & BRAKE SWITCH
MAIN FAN RELAY 1
A/C RELAY
PRESSURE SWITCH
SUB FAN RELAY
WASTEGATE CONTROL SOLENOID VALVE
HIGH PRESSURE FUEL PUMP
PURGE CONTROL SOLENOID VALVE 1
INTAKE CAMSHAFT POSITION SENSOR LH
FRONT OXYGEN (A/F) SENSOR
REAR OXYGEN SENSOR
MASS AIR FLOW &
INTAKE AIR TEMPERATURE SENSOR
FUEL
INJECTOR
RELAY
BATTERY
F/B FUSE No. 2
F/B FUSE No. 7
F/B FUSE No. 4
15WRX_STI_US_EN.book 180 ージ 20  
WI-181
Engine Electrical System
WIRING SYSTEM
I/F
WI-44381
8
9
10
11
12
7
3
4
C8
B3
B44
C16
C24
C32
B13
B45
A29
A31
A30
A18
A19
A17
J/C
B18
C2
B17
B29
C1
B30
B25
B4
C15
C7
C23
C31
B38
B41
B40
C14
C30
B26
B14
C29
B19
B31
C22
C6
C27
A35
C17
A47
C10
C18
C25
B2
5
6
2
1
C13
C5
C21
B6
C19
C26
A27
A3
A15
TFT
I/F
A2
A4
A45
B43
ELCM
ECM
MT
SWITCHING VALVE
PRESSURE SENSOR
VACUUM PUMP
KEYLESS ACCESS CM
BRAKE BOOSTER PRESSURE SENSOR
OIL LEVEL SWITCH
POWER SUPPLY CIRCUIT
DRIVE CIRCUIT
SPEAKER
CAN
COMMUNI-
CATION
SATELLITE
SWITCH
(SI-DRIVE)
DRIVE CIRCUIT
MALFUNCTION
MICRO COMPUTER
OIL PRESSURE
TACHOM-
ETER
ENGINE
COOLANT
TEMP.
GAUGE
CAN TRANSCEIVER &
RECEIVER
COMBINATION METER
OIL PRESSURE
SWITCH
ENGINE GROUND
CAN
COMMUNICATION
CRUISE CONTROL
SWITCH
DATA LINK CONNECTOR
EGR CONTROL VALVE
FUEL PRESSURE SENSOR
ENGINE OIL TEMPERATURE SENSOR
EXHAUST OIL CONTROL SOLENOID RH
EXHAUST OIL CONTROL SOLENOID LH
INTAKE OIL CONTROL SOLENOID RH
INTAKE OIL CONTROL SOLENOID LH
ENGINE COOLANT TEMPERATURE SENSOR
MANIFOLD ABSOLUTE PRESSURE &
INTAKE AIR TEMPERATURE SENSOR
ELECTRONIC THROTTLE CONTROL
IGNITION COIL
No. 4
IGNITION COIL
No. 3
IGNITION COIL
No. 1
IGNITION COIL
No. 2
ACCELERATOR
PEDAL POSITION
SENSOR
KNOCK SENSOR RH
KNOCK SENSOR LH
TUMBLE GENERATOR VALVE ACTUATOR RH
TUMBLE GENERATOR VALVE ACTUATOR LH
CRANKSHAFT POSITION SENSOR
DELIVERY MODE FUSE
BATTERY
SENSOR
15WRX_STI_US_EN.book 181 ージ 20  
WI-182
Engine Electrical System
WIRING SYSTEM
WI-44382
2a 2a
B220
B134A:
E158B:
A
B
G/R
W/G
B/O
G/R
3
5
G/R
B
R/B
R/B
W/G
1
2
R/G A25
B/R A37
A32
L/O A1
Y/B
A7
Y/L
L/R B8
A6
A43
A20
W
Y
A26B/O
W/G A45
B43
A4
R/B
G/B
A2
Y/R
W/R A13
ECM
REF. TO POWER SUPPLY CIRCUIT [2d]
ALT-2
GENERATOR
FB-38
F/B FUSE NO. 12
(IG)
MB-25
M/B FUSE NO. 11
(B)
REF. TO RADIATOR FAN SYSTEM [1a]
FUEL PUMP RELAY
REF. TO CRUISE CONTROL SYSTEM [1b]
REF. TO GND [d]
REF. TO PUSH BUTTON START
SYSTEM [1b] [1c]
REF. TO AIR CONDITIONING SYSTEM [a]
15WRX_STI_US_EN.book 182 ージ 20  
WI-183
Engine Electrical System
WIRING SYSTEM
WI-44383
2b 2b
6
7
5
B134A:
R122
R1
B97
R58
R/B
3
4
1
2
L
G/Y
G/R
B/R
5
G/R
1
R/B
2
G
3
LG/R
4
B
6
G/Y
A
B
R/B
R/B
G
W/L
LG/R
LG/R
A44
LG/R
A40
W/L
ECM
FUEL LEVEL SENSOR
FUEL PUMP
FUEL PUMP
ASSY
REF. TO GND [g]
FUEL PUMP CU
REF. TO FUEL GAUGE SYSTEM [a]
15WRX_STI_US_EN.book 183 ージ 20  
WI-184
Engine Electrical System
WIRING SYSTEM
WI-44384
i231
B553
2c 2c
B22
E3
i10
i229
B551
E11
85
3
B
BR/W20
W/LW/L
40
L32
GR 31
R33
38B
B
G
1
G/O 3G/O
I/F
TFT
GR
I/F
SPEAKER
DRIVE CIRCUIT
OIL PRESSURE
CAN TRANSCEIVER &
RECEIVER
MICRO COMPUTER
MALFUNCTION
DRIVE CIRCUIT
POWER SUPPLY
CIRCUIT
OIL PRESSURE SWITCH
FB-18
F/B FUSE NO. 7
(B)
FB-12
F/B FUSE NO. 2
(IG)
TACHOM-
ETER
ENGINE
COOLANT
TEMP.
GAUGE
COMBINATION
METER
REF. TO GND [e]
REF. TO CAN COMMUNICATION SYSTEM [b]
15WRX_STI_US_EN.book 184 ージ 20  
WI-185
Engine Electrical System
WIRING SYSTEM
WI-44385
2d 2d
5
6
2
3
1
B68 ST1
i229 B551
ST3
GR
B
B
S/I
S#/I
B/W
B/W
V
11
10
7
8
V
B
GR
GR
GR
ROLL CONNECTOR
SATELLITE SWITCH
(SI-DRIVE)
REF. TO GND [b]
REF. TO CLEARANCE LIGHT &
ILLUMINATION LIGHT SYSTEM
[1a]
15WRX_STI_US_EN.book 185 ージ 20  
WI-186
Engine Electrical System
WIRING SYSTEM
WI-44386
2e 2e
B14
B550
T7
PRND
A:
B134
T3
B12
12
11
2
3
5
1
B/WB/W
W/L
W/B
W/R
W/B
B/RG/B
RA10
A33
A8
B/LA14
LA9
6B/Y
B/Y
9B/W
B/W
W/R
W/BW/B
1
B225
B/W
B/L
ECM
B106
MT
MT
MT
CVT
*
1
*
4
LG 2
W/L 1
*
1
*
3
*
2
*
2
*
3
*
4
1
T2 B25
2
B25 T2
MT
MT CVT
CVT
CVT
MT
22R/W
CVT
8W/R
CVT
21B/W
CVT
7W/B
CVT
C
STARTER RELAY 1
REF. TO CAN COMMUNICATION SYSTEM [a]
BATTERY
ST-2
STARTER CUT
RELAY
ST-1
F/B FUSE NO.21
(ST)
STARTER MOTOR
FUSE HOLDER
INHIBITOR SWITCH
CLUTCH START SWITCH
: MT MODEL : W/B
CVT MODEL : W/R
: MT MODEL : G/B
CVT MODEL : R/W
: MT MODEL : W/B
CVT MODEL : B/W
: MT MODEL : LG
CVT MODEL : B/W
10A
10A
NEUTRAL
POSITION
SWITCH 1
15WRX_STI_US_EN.book 186 ージ 20  
WI-187
Engine Electrical System
WIRING SYSTEM
ECM
WI-44387
2f 2f
B550
B220
B220
B225
B225
A:
B134
15A
15A
D
B564
W/R
W/L
15 W
R18
12
13
LG
Y/L
10
11
20
18LG
B/O
22
21
R/L
B/O
L/B
G
Y/L 16
17
14
L
3 W/L
15
16 G/L
W
R
G/L
W
R
G/L 8
9LG
L/B 6
7
E
L17
W/RA36
W/RA48
LGA38
Y/L
A12 Y/L
A24
GA11
R/LA39
15A
15A
2 W/R
4 W/Y
W/BW/B
W/B 11
9LG
W/R 12
13D4
WE7
BRC4
6
7
W/YB9
Y/L
Y/L
F
G
Y/L
H
Y/L
I
MB-23
SBF-7
(B)
MB-24
SBF-7
(B)
MB-22
SBF-5
(B)
C: F35
B: B143
E: F36
D: B144
F27
FUEL INJECTOR
RELAY
ELECTRONIC THROTTLE
CONTROL RELAY
A/F, OXYGEN
SENSOR RELAY
MAIN RELAY
IG RELAY
FUSE HOLDER
20A
M/B
RELAY HOLDER
15WRX_STI_US_EN.book 187 ージ 20  
WI-188
Engine Electrical System
WIRING SYSTEM
WI-44388
2g 2g
12
13
8
F27
B9
B40
A:
B134
E158
B:
B:
F109
C:
B360
J
5
8
7
6
2
1
I
B22 E3
B564
B45
WW
G/YG/Y
C2
B20 B/Y
C10
B6
B/R
B/R
B/R
P8
9
R6
B/Y4
B/R5
L
1
2
14
W16
G/Y8
Y/L
R/L
W/B
B/Y
B/W B1
W/R
B564
G
30A
G
Y/L
C
B/R
W/B
L/B B37
R/Y A34
BR/Y
R/L
10
Y/L B3
SB 2
W1
SB
PP
P
A23W
B/Y
ECM
BATTERY SENSOR
B107
MT
MT
MT
MT
BRAKE PUMP
RELAY
REF. TO GND [c]
BRAKE PUMP
FUSE
REF. TO CAN COMMUNICATION
SYSTEM [b]
DATA LINK
CONNECTOR
MB-27
M/B FUSE NO. 13
(B)
FB-32
F/B FUSE NO. 4
(IG)
DELIVERY
MODE FUSE
THROUGH
JOINT
CONNECTOR
MB-33
MAIN SBF
(B)
CLUTCH SWITCH
15WRX_STI_US_EN.book 188 ージ 20  
WI-189
Engine Electrical System
WIRING SYSTEM
WI-44389
2h 2h
B315
E158
B:
B134
A:
B122
B3
9
6
8
1
4
3
7
B565
11
3
4
5
1
6
2
J/C
*
1
*
1
*
1
*
1
*
1
*
1
*
1
5
3
2
4
1
H
*
1
E3 B22
B97 R1
R400
18
5
17
20
15
16
19
E3 B22
O
A29
O
Y/L
G/B
A30
G/B
L
A31
L
L/YA18
L/Y
R/L
A17
R/L
G/Y
G/Y
S
G/B
G/R
S
G/W
G
G
W/L
B/L
Y/G
Y/L
W/L
A16
B/L
A28
G/Y
B5
G/Y
Y/G
BR/W
W/L
Y/G
BR/W
L/Y
G/B
BR/W
A27
ELCM
Y/LY/LY/L
LGA3
L/O
GR
Y/L
L/O
LG
L/O
A15
G/W
1
R
2
L/Y
3
G/RA19
Y/BB13 R
ECM
SWITCHING
VALVE
PRESSURE
SENSOR
VACUUM PUMP
BRAKE BOOSTER
PRESSURE SENSOR
: TERMINAL No. OPTIONAL ARRANGEMENT
MASS AIR FLOW &
INTAKE AIR
TEMPERATURE
SENSOR
ACCELERATOR
PEDAL POSITION
SENSOR
15WRX_STI_US_EN.book 189 ージ 20  
WI-190
Engine Electrical System
WIRING SYSTEM
E158
B:
E159
C:
WI-44390
2i 2i
4
E75
F
K
L
N
M
B22 E3
Y/L R1
R1
L/W 2
O2
B/Y 1
L/WC11
W/B 2
W/BB19
OB2
Y3YB31
B/Y 1
L/W 2
B/L 3
B/Y 2
G/B 1
BR/R 3
B/L 4
W2
B/Y 1
WB26
B2
B/Y 1
BB14
L/WB6
G/BB25
BR/RB4
B/LC19
R
B/R
B/L
B/Y
Y/L R
E124
E162
E14
E48
E10
E64
ECM
KNOCK
SENSOR RH
KNOCK
SENSOR LH
ENGINE OIL
TEMPERATURE
SENSOR
MANIFOLD ABSOLUTE
PRESSURE &
INTAKE AIR
TEMPERATURE
SENSOR
FUEL PRESSURE
SENSOR
WASTEGATE CONTROL
SOLENOID
VALVE
CRANKSHAFT
POSITION
SENSOR
15WRX_STI_US_EN.book 190 ージ 20  
WI-191
Engine Electrical System
WIRING SYSTEM
WI-44391
2j 2j
E158
B:
E159
C:
E18
E57
K
M
O
E8
E4
E52
Q
P
E130
B44
R R5
R2
O6
L/Y 4
R/Y 3
GR 1
R5
GR 2
W6
O3
L1
P
R
GR
W
O
L
P 4
C1
B18
C2
B30
B17
B29
GRB38
Y/GC4
Y/BC12
OC29
L/YC13
R/YC5
GRC21
B/Y
B/R
B/Y 1
GR 2
B/Y
R1
Y/G 2
R1
Y/B 2
R
W1
W
ECM
OIL LEVEL SWITCH
PURGE CONTROL
SOLENOID
VALVE 2
PURGE CONTROL
SOLENOID
VALVE 1
ENGINE COOLANT
TEMPERATURE
SENSOR
ELECTRONIC
THROTTLE
CONTROL
EGR CONTROL
VALVE
15WRX_STI_US_EN.book 191 ージ 20  
WI-192
Engine Electrical System
WIRING SYSTEM
WI-44392
2k 2k
E159
C:
E158
B:
1
E3B22
R
D
O
Q
E25
E5
E16
E6
E17
E160
G/WC9
L/YB12
L/BB11
R/LB15
G
R
B39
B27
R4
W3
G
W
B/O
5
G/W 2
R/L 1
L/Y 1
L/B 2
GC3
YB16
BR
B/Y
B42
C27
W1
BR 3
G2
Y4
WB24
RB23
W1
R2
L/YB36
L/BB35
L/Y 1
L/B 2
WB48
RB47
W1
R2
LB10
PB22
L1
P2
B/O
B/R
B/Y
L
B/R
B/Y
ECM
E24
B/R
B/R
B/R
B/R
GE-2
HIGH PRESSURE
FUEL PUMP
FUEL
INJECTOR
No. 4
FUEL
INJECTOR
No. 3
FUEL
INJECTOR
No. 2
FUEL
INJECTOR
No. 1
REAR OXYGEN
SENSOR
FRONT
OXYGEN (A/F)
SENSOR
15WRX_STI_US_EN.book 192 ージ 20  
WI-193
Engine Electrical System
WIRING SYSTEM
ECM
E158
B:
E159
C:
WI-44393
2l 2l
E55
E51
R
N
P
E35
E36
E65
E62
B/Y
B/L 3
B/Y 2
W/R 1
W/L 4
R/L 5
B/Y 2
B/L 3
Y/R 1
Y/L 4
P/L 5
W/R
W/L
R/L
B40
P/LC6
Y/LC22
Y/RB41
C14
C30
G/RB21
L/WB34
B/L
R
R1
L/W 3
G/R 2
G/WB20
R1
L/W 3
G/W 2
Y/GB33
R1
L/W 3
Y/G 2
Y/LB32
R1
L/W 3
Y/L 2
EXHAUST CAMSHAFT
POSITION
SENSOR LH
EXHAUST CAMSHAFT
POSITION
SENSOR RH
INTAKE CAMSHAFT
POSITION
SENSOR RH
INTAKE CAMSHAFT
POSITION
SENSOR LH
TUMBLE GENERATOR
VALVE ACTUATOR LH
TUMBLE GENERATOR
VALVE ACTUATOR RH
15WRX_STI_US_EN.book 193 ージ 20  
WI-194
Engine Electrical System
WIRING SYSTEM
E159
C:
3
2
WI-44394
2m 2m
E37
E
E38
E66
E63
G
E34
E33
E32
E31
B22 E3
B1
L/W 2L/WC15
L/B
B1
G/W 2G/WC7
B1
W2
WC31
B1
BR/R 2
BR/RC23
Y/L
BR/W 1
L/Y 2
W3
L/YC8
BR/W 1
G/Y 2
W3
G/YC16
BR/W 1
BR/Y 2
W3
BR/YC24
BR/W 1
Y2
W3
YC32
W
W
W
W
L/B BR/W
Y/L B
GE-2
ECM
IGNITION COIL
No. 1
IGNITION COIL
No. 2
IGNITION COIL
No. 3
IGNITION COIL
No. 4
EXHAUST
OIL CONTROL
SOLENOID RH
EXHAUST
OIL CONTROL
SOLENOID LH
INTAKE
OIL CONTROL
SOLENOID RH
INTAKE
OIL CONTROL
SOLENOID LH
15WRX_STI_US_EN.book 194 ージ 20  
WI-195
Engine Electrical System
WIRING SYSTEM
WI-44395
C:
E159
A:
B134
15
16
2n 2n
J
B22
E3
B
B/Y
B/Y
B
B
B
B
B
B
B
B/R
B/L
B
B
C25
C18
C17
A47
A35
C10
C26
B/R
B/R
B/R
B/L
ECM
GE-1
REF. TO CRUISE CONTROL SYSTEM [1b]
15WRX_STI_US_EN.book 195 ージ 20  
WI-196
Engine Electrical System
WIRING SYSTEM
LIST OF CONNECTORS
RELAY HOLDER
FUSE HOLDER
RELAY HOLDER
2o 2o
123
4
5
12
5
9
1
6
10
2
7
11
3
8
12
4
1
12
3
4
5678
9
10 11 12
1413 15 16
12
1
9
8
16
2
10
7
15
3
11
6
14
4
12
5
13
3
42
156
7
13 1411
12
9
10
8
89
19 20
1234 567
10 11 12 13 14 15 16 17 18
2
1
34
2
1
78
5
6
10
11 12
23 24
35 36
47 48
3
5
6
7894
12
45
4643 4441 4239 4037 38
21
2219 2017 1815 1613 14
33
3431 3229 3027 2825 26
1
5
76
2
8
34
9
10 11
12
13
14 15
16
18
19 21 22
20
17
24
5
3
17
9
8
6
32 33
34
35
28262423
25
27
29
30
31
36 37
38
40
41 43 44
42
39
56341
2
123 4567
89
10 11 12 13 14 15 16
91
2
232221 262524201918
4
13
12
17
3
16
6
15
587
14
10 11
3
4
12
9
5
7
8
6
10
12
13
11
14
16
17
15
123
12
12
1
2
213
3
1
2
645
12
34
3
12
213
12
45
213
12
123456
WI-44396
B22
(BR)
B25
(BR)
B220 B225
B40
(B)
B97
B3
(B)
B9
(B)
B315
(B)
B550
(B)
B360
C:
(GR)
B68
B12
(B)
B122
(GR)
B106
B134A:
(BR)
B144D:
(BR)
B143B:
(
GR
)
E18
E36
E35
(
GR
)
(GR)
(GR)
E65
E62
(
GR
)
(
B
)
(
B
)
E38
E66
E37
E63
(B)
(
GR
)
E51
E55
(
GR
)
(
GR
)
B14
(B)
E6
E5
E17
E16
(GR)
(GR)
(GR)
(GR)
(G)
E25
(B)
(B)
E64
E52
(B)
E57
(B)
E10
(B)
(B)
(B)
(B)
E34
E33
E32
E31
B564
B565
(B)
(
B
)(
B
)
E48
(
B
)
E75
E8
(
B
)
E14
(
L
)
E4
B107
(L)
12
E24
(B)
1
3
2
465
15WRX_STI_US_EN.book 196 ージ 20  
WI-197
Engine Electrical System
WIRING SYSTEM
LIST OF CONNECTORS
RELAY HOLDER
2p 2p
79
10
85
23
11 12
6
19 21 222017
24
35 36
47 48
18
31 33 343229 30
43 45 464441 42
3412
15 1613 14
27 2825 26
39 4037 38
5
7
8
6
3
9
12
4
13
15
16
14
11
10
17 18
25 26
12
21
23
24
22
19 20
29
31
32
30
27 28
12
24
23
25
12 13 14
15
16
26
2221
20
19
1817
10 11
2
4
5
13
7698
3412 89
10 11
12 13 14 15 16 17 18 19 20 21 22 23 24
567
11 12
9
10
7856341
2
15 1613 14 19
18
20
21 22 23 24 26
25
27 28 29 30 31 32 33 34 35 36 37 38 39 40
17
43
1
2
634512
1234
5678
1
78
69
2345
2
1
89
5
12
6
7
34
1110
WI-44397
i10
F27
F109
B:
R58
T7
(B)
(GR)
C:
E159
(B)
B:
E158
(B)
E160
R122
R400
ST3
E130
1
E124
(B)
1234
E162
(B)
213
12
3
45
6789
10 11 12
F35
(L)
C:
F36E:
12 3
45 6 7
i229
12 345
6789
10 11 12
i231
12345 6789
10 11 12 13 14 15 16 17 18 19 20
15WRX_STI_US_EN.book 197 ージ 20  
WI-198
Engine Electrical System
WIRING SYSTEM
3. ENGINE TYPE EJ (WITHOUT PUSH BUTTON START)
J/C
WI-44398
7
8
9
10
11
2
1
3
4
5
6
C35
C16
B26
B9
C30
C33
B10
B7
B13
B17
D7
A33
D15
C1
OFF ACC
ON ST
A10
C31
C11
C22
C10
D16
D30
D24
C5
C6
C19
C18
B6
C20
C9
D29
D23
D6
A11
A12
A13
B35
C7
C3
C13
C15
C12
B25
D28
SBF-5
SECONDARY
AIR FUSE
SECONDARY
AIR PUMP
SBF-7
SBF-6
SBF-8
ECM
B27
B20
B8
POWER STEERING
OIL PRESSURE SWITCH
NEUTRAL POSITION
SWITCH 1
BODY INTEGRATED UNIT (IMMOBILIZER)
CRUISE CONTROL SWITCH
STOP LIGHT & BRAKE SWITCH
INTAKE CAMSHAFT POSITION SENSOR RH
INTAKE CAMSHAFT POSITION SENSOR LH
EXHAUST CAMSHAFT POSITION SENSOR LH
EXHAUST CAMSHAFT POSITION SENSOR RH
FUEL INJECTOR No. 4
FUEL INJECTOR No. 3
FUEL INJECTOR No. 2
FUEL
PUMP
RELAY
F/B FUSE No. 21
F/B FUSE No. 12
CLUTCH START
SWITCH
CLUTCH SWITCH
F/B FUSE No. 2
F/B FUSE No. 4
M/B FUSE No. 13
PRESSURE SWITCH
A/C RELAY
PURGE CONTROL SOLENOID VALVE 1
PURGE CONTROL SOLENOID VALVE 2
FUEL INJECTOR No. 1
REAR OXYGEN SENSOR
FRONT OXYGEN (A/F) SENSOR
MASS AIR FLOW & INTAKE AIR TEMPERATURE SENSOR
WASTEGATE CONTROL SOLENOID VALVE
FUEL PUMP ASSY
(FUEL PUMP)
MAIN RELAY
FUSE HOLDER
A/F, OXYGEN
SENSOR RELAY
SECONDARY
AIR COMBINATION
VALVE RELAY 2
SECONDARY
AIR COMBINATION
VALVE RELAY 1
M/B
M/B
SECONDARY
AIR PUMP RELAY
STARTER RELAY 1
STARTER MOTOR
IGNITION SWITCH
FUEL
GAUGE
SYSTEM
ELECTRONIC THROTTLE
CONTROL RELAY
F/B FUSE No. 7
IG 2 RELAY
MAIN
SBF
M/B FUSE No. 11
BATTERY
FUSE HOLDER
FUEL PUMP CU
15WRX_STI_US_EN.book 198 ージ 20  
WI-199
Engine Electrical System
WIRING SYSTEM
WI-44399
7
8
9
10
11
A2
A18
A28
A1
D20
A19
A16
A34
A27
D22
A29
A17
B31
B29
B21
B22
C4
B23
J/C
ELCM
J/C
D31
B30
A24
D8
D2
D3
D17
D25
A3
A6
A23
A5
A14
A7
A15
D9
D12
D10
A25
D11
A26
D1
A4
C2
B14
A32
A31
A22
A21
C34
2
1
3
4
5
6
B11
B12
C17
C28
I/F
I/F
TFT
D27
C21
B4
ECM
VACUUM PUMP
PRESSURE SENSOR
SWITCHING VALVE
ACCELERATOR PEDAL
POSITION SENSOR
CAN
COMMUNICATION
POWER SUPPLY
CIRCUIT
DRIVE CIRCUIT
SPEAKER
MICRO COMPUTER
ENGINE
COOLANT
TEMP.
GAUGE
TACHOM-
ETER
CAN TRANSCEIVER &
RECEIVER
COMBINATION METER
OIL PRESSURE
SWITCH
MAIN FAN RELAY 1
CAN
COMMUNI-
CATION
SUB FAN RELAY
DELIVERY
MODE
FUSE
ENGINE GROUND
TUMBLE GENERATOR VALVE ACTUATOR RH
TUMBLE GENERATOR VALVE ACTUATOR LH
CAN
COMMUNI-
CATION
CRUISE CONTROL SWITCH
DATA LINK CONNECTOR
IGNITION COIL
No. 1
IGNITION COIL
No. 2
IGNITION COIL
No. 4
IGNITION COIL
No. 3
KNOCK SENSOR
CRANKSHAFT POSITION SENSOR
DRIVE CIRCUIT
MALFUNCTION
REV.
OIL PRESSURE
INTAKE OIL FLOW CONTROL SOLENOID VALVE RH
EXHAUST OIL FLOW CONTROL SOLENOID VALVE LH
EXHAUST OIL FLOW CONTROL SOLENOID VALVE RH
SECONDARY AIR COMBINATION VALVE RH
SECONDARY AIR COMBINATION VALVE LH
LEAK DIAGNOSIS CONNECTOR 2
LEAK DIAGNOSIS CONNECTOR 1
INTAKE OIL FLOW CONTROL SOLENOID VALVE LH
ENGINE COOLANT TEMPERATURE SENSOR
MANIFOLD ABSOLUTE PRESSURE SENSOR
ELECTRONIC THROTTLE CONTROL
MULTI
SELECT
SWITCH
(SI-DRIVE)
15WRX_STI_US_EN.book 199 ージ 20  
WI-200
Engine Electrical System
WIRING SYSTEM
WI-44400
3a 3a
B220
B135B:
B136C:
B
B
G/R
W/G
G/RG/R
3
5
G/R
B
R/B
R/B
A
G/R
W/G
1
2
R/G
B11
B/R B12
C30
Y/B
C7
L/O
B35
W
GR/W
C12
C13
C3
C15Y
BR/W
W/L
B25
ECM
REF. TO IMMOBILIZER SYSTEM [3a]
FB-38
F/B FUSE NO. 12
(IG)
MB-25
M/B FUSE NO. 11
(B)
REF. TO RADIATOR FAN SYSTEM [2a]
FUEL PUMP RELAY
REF. TO CRUISE CONTROL SYSTEM [2b]
REF. TO GND [d]
REF. TO AIR CONDITIONING SYSTEM [a]
15WRX_STI_US_EN.book 200 ージ 20  
WI-201
Engine Electrical System
WIRING SYSTEM
WI-44401
3b 3b
6
7
5
B135B:
B136C:
R122
R1
B97
R58
R/B
5
6
1
4
L
G/Y
G/R
B/R
6
G/R
10
R/B
8
G
9
LG/R
5
B
7
G/Y
B
B
R/B
R/B
G
G
LG/R
LG/R
B10
LG/R
C33
G
ECM
FUEL LEVEL SENSOR
FUEL PUMP
FUEL PUMP ASSY
REF. TO GND [g]
FUEL PUMP CU
REF. TO FUEL GAUGE SYSTEM [a]
15WRX_STI_US_EN.book 201 ージ 20  
WI-202
Engine Electrical System
WIRING SYSTEM
8
9
1
2
5
8
WI-44402
i231
B553
i2
R339
R18
R21
R33
AD10
3c 3c
B21
E2
i10
i229
B551
E11
837
3
BR/W20
W/LW/L
40
L32
R33
38B
B
G
1
G/O 3
BR 26
G/L
BR
G/L
BR
G/L
R
B
35
G/O
I/F
TFT
I/F
SPEAKER
DRIVE CIRCUIT
OIL PRESSURE
REV.
CAN TRANSCEIVER &
RECEIVER
MICRO COMPUTER
MALFUNCTION
DRIVE CIRCUIT
POWER SUPPLY
CIRCUIT
OIL PRESSURE SWITCH
MULTI SELECT
SWITCH
(SI-DRIVE)
FB-18
F/B FUSE NO. 7
(B)
FB-12
F/B FUSE NO. 2
(IG)
TACHOM-
ETER
ENGINE
COOLANT
TEMP.
GAUGE
COMBINATION METER
REF. TO GND [e]
REF. TO CAN COMMUNICATION SYSTEM [b]
I
S#
S
15WRX_STI_US_EN.book 202 ージ 20  
WI-203
Engine Electrical System
WIRING SYSTEM
B106
2
1
CLUTCH START
SWITCH
8
22
W/B
B/W
10A
B550
WI-44403
3d 3d
B14
B:
B135
C:
B136
2
3
5
1
B/W
W/B
RC17
B/WC16
B/RB26
LC28
1
B225
W/L
B/W
LG LG
W/L
B/R
W/B
ST-2
IG SW
(ST)
ECM
1
2
T2 T12
5
T9 B128T12 T2
2
B128 T9
C
LLG/YBG/WC35
ST-1
F/B FUSE NO. 21
(ST)
REF. TO CAN COMMUNICATION SYSTEM [a]
BATTERY
STARTER RELAY 1
STARTER MOTOR
NEUTRAL POSITION
SWITCH 1
FUSE HOLDER
15WRX_STI_US_EN.book 203 ージ 20  
WI-204
Engine Electrical System
WIRING SYSTEM
WI-44404
3e 3e
B550
B220
B225
B225
B:
B135
C:
B136
D:
B137
15A
15A
D
W/R
W/L
16 W
R19
W/Y
12
13
LG
Y/B
10
11
20
18LG
B/R
22
21
R/L
B/R
Y/B
Y/B
L/R
Y/B 16
17
14
L
4 W/L
15
W
R
W
W
E
F
L18
LGB13
Y/B
C1 Y/B
D7
L/RB7
R/LB17
15A
Y/B
G
2 W/R
5 W/Y
MB-23
SBF-7
(B)
MB-24
SBF-7
(B)
MB-22
SBF-5
(B)
ECM
ELECTRONIC THROTTLE
CONTROL RELAY
A/F, OXYGEN
SENSOR RELAY
MAIN RELAY
FUSE HOLDER
15WRX_STI_US_EN.book 204 ージ 20  
WI-205
Engine Electrical System
WIRING SYSTEM
WI-44405
3f 3f
F27
B40
B:
F109
C:
B360
C:
B136
B:
B135
H
I
B107
C34
W
G/Y
C2W
B9R/Y
C2
B20 B/Y
C10
B6
B/Y
B/Y
P
P
B/Y
P8
9
R6
L14
B/W5
B/Y
B/Y
4
W16
B14V/RV/R7
G/Y8
B/W
P
R/Y
G/Y
2
1
ECM
REF. TO GND [c]
CLUTCH SWITCH
REF. TO CAN COMMUNICATION SYSTEM [b]
DATA LINK
CONNECTOR
MB-27
M/B FUSE NO. 13
(B)
FB-32
F/B FUSE NO. 4
(IG)
DELIVERY
MODE FUSE
THROUGH
JOINT CONNECTOR
15WRX_STI_US_EN.book 205 ージ 20  
WI-206
Engine Electrical System
WIRING SYSTEM
WI-44406
3g 3g
B135
B:
B136
C:
B137
D:
B83
6
8
1
4
3
7
B315
B97 R1
R400
B3
J/C
*
1
J
K
G
18
5
17
20
15
16
19
*
1
*
1
*
1
*
1
*
1
BR/W
W/L
Y/G
S
BR/W
L/Y
G/O
BR/W
B4
B/G
C11
W
C22
OB31
Y/WB30
G2
L/Y 1
W6
L5
G/B 4
O3
ELCM
G/B
B21
LB29
WB23
SC10
Y/L
C31
Y/BY/B 3
Y/R 2
Y/L 1
W5
B/G 4
L/YB22
Y/W
G/O
G
Y/R
Y/R
Y/LY/B
LGD27
L/O
GR
Y/L
L/O
LG
L/O
C21
Y/R
ECM
SWITCHING
VALVE
MASS AIR FLOW &
INTAKE AIR TEMPERATURE
SENSOR
ACCELERATOR PEDAL
POSITION SENSOR
PRESSURE
SENSOR
VACUUM PUMP
: TERMINAL No. OPTIONAL ARRANGEMENT
15WRX_STI_US_EN.book 206 ージ 20  
WI-207
Engine Electrical System
WIRING SYSTEM
WI-44407
3h 3h
B134
A:
1
2
4
3
B19 T5
B21 E2
B379
D
K
2
1
4
3
E38
2
1
22
21
E37
2
1
32
33
B135
B:
B136
C:
W/RC5
W/RC6
WB6
WC20
WC19
B
W/R
W
B
*
1
S
*
1
S
S
S
*
1
R/B
C18
R/BC9
Y/R
W
B/RB/R
B/R
W
G/LA17
Y/R
G/RA27
W/B
G/B
G/R
G/WA34 G/W G/B
W/B
GA16
Y/B
L/B
G
G/L
Y/B
L/B
E66
1
2
43
42
L/RA14
L/WA5
GR
L/Y
L/W
L/R
GR
L/Y
E63
1
2
17
7
L/BA15
R/WA7
G/R
BR/Y
R/W
L/B
G/R
BR/Y
ECM
B1
J/C
L
W/B
Y/R
W
L
W/B
Y/R
W
4
1
2
3
*
1
INTAKE OIL FLOW CONTROL
SOLENOID VALVE LH
EXHAUST OIL FLOW CONTROL
SOLENOID VALVE LH
EXHAUST OIL FLOW CONTROL
SOLENOID VALVE RH
INTAKE OIL FLOW CONTROL
SOLENOID VALVE RH
FRONT OXYGEN (A/F)
SENSOR
REAR OXYGEN
SENSOR
T6
: TERMINAL No. OPTIONAL ARRANGEMENT
15WRX_STI_US_EN.book 207 ージ 20  
WI-208
Engine Electrical System
WIRING SYSTEM
WI-44408
3i 3i
E10
E57
E14
E2
B21
E21
E8
D:
B137
A:
B134
L
Q
P
M
N
12
23
38
39
6
28
25
24
4
3
14
D25
B
D17
W
D31 S
D8 S
A28 L
A29
A19 BR/W
A18 W
2
1
4
1
D2
W
G
L
1
W
2
B
5R
W
2
B/L
W/R
W
W/R
Y/G
Y/G
Y/G
W
A2 G/Y
Y/G
A1 W/B
BR/WD22
3
2
R
B/L
Y/G
1
2
B/L
GR
S
G
L
B
W
W
L
W
BR/W
G/Y
W/B
GR
W
B
W
6
3B/L
Y/G
B/L
BR/W
R
1O
Y/WD20
Y/W
O
B/L
O
B/L
R
R
ECM
ENGINE COOLANT
TEMPERATURE
SENSOR
MANIFOLD ABSOLUTE
PRESSURE SENSOR
KNOCK SENSOR
ELECTRONIC
THROTTLE CONTROL
CRANKSHAFT POSITION
SENSOR
15WRX_STI_US_EN.book 208 ージ 20  
WI-209
Engine Electrical System
WIRING SYSTEM
WI-44409
D:
B137
A:
B134
3j 3j
E64
E52
E4
E5
E16
E6
E17
E19
R
E2
B21
44
50
48
53
54
11
51
18
52
F
V
D15
R/G
D6
P
A10
P/L
A11
P/B
A12
P/G
A13
B/W 1
W2
B/W
1
G/W 2
B/W 1
L/W 2
B/W 1
W2
B/W
B/W
1
BR/R 2
L/W
G/W
W
G/W
L/W
W
BR/R
G/W 2
B/W 1
L/W 2
A33
Y/R
Y/B Y/B B/W 1B/W
P/B
D28
R/Y 1
R/Y
ECM
POWER STEERING
OIL PRESSURE SWITCH
FUEL INJECTOR
No. 4
FUEL INJECTOR
No. 3
FUEL INJECTOR
No. 2
FUEL INJECTOR
No. 1
PURGE CONTROL
SOLENOID VALVE 1
WASTEGATE
CONTROL
SOLENOID
VALVE
PURGE CONTROL
SOLENOID VALVE 2
15WRX_STI_US_EN.book 209 ージ 20  
WI-210
Engine Electrical System
WIRING SYSTEM
WI-44410
3k 3k
D:
B137
A:
B134
E51
E55
E35
E36
R
P
M
E2 B21
30
29
27
19
8
16
13
5
2
4
5
1
L
Y/R
Y/L
4
5
W/L
P/L
2
3
W/L
G/Y
1
B
1
2
G/R
B
3
W/L
D16
D30
A25
A26
D24
R/BW/L
R/LP/L
R/G
R/Y
L
Y/L
G/Y G/W
W/L Y/B
G/R G/O
E65
26
1
2
G/W
B
3
W/L
G/W BR/Y D29
E62
15
1
2
G/B
B
3
W/L
G/B Y/B D23
A23
A24
W/L
D10
B/W
B/L
R
Y/R
1
W/R
D11
W/RW/R
2
B/L
2
B/L
3
R
3
R
ECM
INTAKE CAMSHAFT
POSITION SENSOR RH
EXHAUST CAMSHAFT
POSITION SENSOR LH
EXHAUST CAMSHAFT
POSITION SENSOR RH
INTAKE CAMSHAFT
POSITION SENSOR LH
TUMBLE GENERATOR
VALVE ACTUATOR RH
TUMBLE GENERATOR
VALVE ACTUATOR LH
15WRX_STI_US_EN.book 210 ージ 20  
WI-211
Engine Electrical System
WIRING SYSTEM
WI-44411
3l 3l
A:
B134
E31
E32
E33
E34
E2
B21
A
20
9
49
31
10
G/R G/R
G/Y
1
B2
G/Y
R
3R
L/Y
1
B/W
2
R3
L/Y
BR/Y 1
B
2
R3
BR/Y
Y
1
B/W
B/W
2
R
3
Y
A22
A31
A32
A21
Y/G
W/G
W/L
E80
E87
45
L/R
2
W
1
W
1
B/R
B/R
2
L/R
D12 Y/R
W/R
ECM
S
B
T
U
D:
B137
IGNITION COIL No. 4
LEAK DIAGNOSIS
CONNECTOR 1
LEAK DIAGNOSIS
CONNECTOR 2
IGNITION COIL No. 3
IGNITION COIL No. 2
IGNITION COIL No. 1
15WRX_STI_US_EN.book 211 ージ 20  
WI-212
Engine Electrical System
WIRING SYSTEM
WI-44412
3m 3m
F9
F9
F9
F11
6W
5
16
15 W
A5 R/B
A18 9RR
A8 R/G
B4 R/G
B12 R
B2 R/B
B8 R/B
B20 R
B27 R/G
W
W
B:
B135
A:
F37
B:
B143
F9
10A
60A
R
L
Y/L
L8
Y/LY/L 10
7
2
4
R/B
1Y/L
R3
Y/B
Y/B 12
R/G 13
14
W11
W2
B1
V
W
X
Y
MB-34
MAIN SBF
(B)
MB-33
MAIN SBF
(B)
RELAY HOLDER
M/B
ECM
SECONDARY
AIR COMBINATION
VALVE RELAY 1
SECONDARY
AIR COMBINATION
VALVE RELAY 2
SECONDARY
AIR PUMP
RELAY
SECONDARY
AIR PUMP
GP
15WRX_STI_US_EN.book 212 ージ 20  
WI-213
Engine Electrical System
WIRING SYSTEM
WI-44413
3n 3n
A16L
R
Y/B
B13
B20
2 BR/R
1W
D:
B137
A:
F37
B:
B143
W
Z
3 B/L
2 R/Y
6BR BR
R/Y D9L/W
4W W
a
1R
B21
E2
46
W
A20Y/B
Y
A13Y/L
X
A17R
L
Y/B
Y/L
R
V
B10Y/B
B14L
B21
E2
1
BR/R
Y/B
E
R
N
B/L
O
E40
L/W
47
M/B
E41
SECONDARY
AIR COMBINATION
VALVE RH
SECONDARY
AIR COMBINATION
VALVE LH
ECM
15WRX_STI_US_EN.book 213 ージ 20  
WI-214
Engine Electrical System
WIRING SYSTEM
WI-44414
3o 3o
B122
C:
B136
D:
B137
A:
B134
*
1
*
1
*
1
*
1
*
1
*
1
*
1
*
1
J/C
E2
B21
H
C
L
J
T
Z
I
34
35
36
40
B/W
B/Y
B/Y
B/Y
B
W
B/WB/Y
B/W B/Y
B/Y
B/Y
L
B/L
S
B/Y
B/L
B/W
B
Q
Y/G
Y/G
S
B/W
B/W
U
B/R
B/R
W
a
WW
S
B/R
B/L
B/W
B/R
B/L
B/Y
D1
A3
A6
C4
A4
B/YD3
GE-3
ECM
REF. TO CRUISE CONTROL
SYSTEM [2d]
: TERMINAL No. OPTIONAL ARRANGEMENT
15WRX_STI_US_EN.book 214 ージ 20  
WI-215
Engine Electrical System
WIRING SYSTEM
LIST OF CONNECTORS
RELAY HOLDER
FUSE HOLDER
3p 3p
456
123
123
4
5
1
123456789
10 11
12 13 14 15 16 17 18 19 20 21 22
23 24 25 26 27 28 29 30 31 32 33
34 35
42 43
36 37 38 39
48 49 50 51 52 53 54
40 41
44 45 46 47
1
9
8
16
2
10
7
15
3
11
6
14
4
12
5
13
89
19 20
1234 567
10 11 12 13 14 15 16 17 18
2
1
12
78
5
6
34
21
123
456
18
2719 20 21 22
23
26
24
25
28 29 3332 3430 31
98
15
1413121110
17
16
1234567
5672134
29
10 11 12 13 14 15
2524
16
30
98
17 18 19
20
28
21 22 23
3231
26 27
33 34 35
19
18
21
20
2322 24 25 26
17
1
23
4
56
27
28 29 30
31 32 33 34 35
798
151413121110 16
19
18
20 21
22
23
26
24
25
27
28 29
30 31
98
15
1413121110
17
16
1234567
10 11
12
13
14 15
16
18
19 21 22
20
17
24
5
3
17
9
8
6
32 33
34
35
28262423
25
27
29
30
31
36 37
38
40
41 43 44
42
39
56341
2
123 4567
89
10 11 12 13 14 15 16
21
43
101
242322 272625212019
5
14
13
18
432
17
7
16
698
15
11 12
12
21
12
21
1
123
2
1
3
12
123
456
12
45
213
213
12
WI-44415
B21 (B)
B220 B225
B107
(L)
B122
B128
(GR)
B136C:
B135
B:
B40
(B)
B97
B3
(B)
B1
B315
(B)
E10
(GR)
E19
(B)
E40
(B)
E41
(B)
E52
E62
(GR)
E63
(L)
E65
(GR)
E66
(L)
B137
D:
B143
B:
(B)
E4
B134A:
E5
E16
E6
E17
(GR) (GR)
(GR) (GR)
E36
E35
(GR)
(GR)
(L)
E38
E37
(L)
B14
(B)
B360
C:
(GR)
B379
(GR)
B550
(B)
B106
(B)
E8
E34
(GR)
E33
(GR)
E32
(GR)
E31
(GR)
B83
E51
(GR)
E55
(GR)
E14
(GR)
(GR)
B19
12
34
E21
(B)
15WRX_STI_US_EN.book 215 ージ 20  
WI-216
Engine Electrical System
WIRING SYSTEM
LIST OF CONNECTORS
3q 3q
1234
56789
10 11 12 13 14 15 16 17 18 19 20
3412 89
10 11
12 13 14 15 16 17 18 19 20 21 22 23 24
567
12345 6789
10 11 12 13 14 15 16 17 18 19 20
12 345
6789
10 11 12
11 12
9
10
7856341
2
15 1613 14 19
18
20
21 22 23 24 26
25
27 28 29 30 31 32 33 34 35 36 37 38 39 40
17
12
34
56789
10
12
34
56
1234
5678
12
21
43
i10
F109
B:
F37
A:
i2
i229
R33
(GR)
R58
(GR)
R122
(BR)
T12
(GR)
T6
R400
i231
321654
12
12
5
11
15
1
2
9
10
34 7
12 13
8
6
16
14
12
24
23
25
12 13 14
15
16
26
2221
20
19
1817
10 11
2
4
5
13
7698
R21
(B)
12 345
6789
10 11 12
WI-44416
E57
(B)
E64
(L)
(GR)
E87
E80
(GR)
F27
F9
F11
RELAY HOLDER RELAY HOLDER
15WRX_STI_US_EN.book 216 ージ 20  
WI-217
Engine Electrical System
WIRING SYSTEM
15WRX_STI_US_EN.book 217 ージ 20  
WI-218
Engine Electrical System
WIRING SYSTEM
4. ENGINE TYPE EJ (WITH PUSH BUTTON START)
FUSE HOLDER
KEYLESS
ACCESS CM
IG RELAY 1
(PUSH BUTTON
START)
F/B FUSE
No. 26
STARTER RELAY
(PUSH BUTTON
START)
STARTER
CUT RELAY
STARTER
RELAY 1
WI-44417
6
7
8
9
10
1
2
3
4
5
B34
C27
B26
B9
C30
C33
B10
B7
B13
B17
D7
A33
D15
C1
A10
C31
C11
C22
C10
D16
D30
D24
C5
C6
C19
C18
B6
C20
C9
D29
D23
D6
A11
A12
A13
B35
C7
D28
SBF-5
SECONDARY
AIR FUSE
SECONDARY
AIR PUMP
SBF-7
SBF-6
SBF-8
ECM
B27
B20
B8
C16
B15
B32
B25
J/C
POWER STEERING
OIL PRESSURE SWITCH
INTAKE CAMSHAFT POSITION SENSOR RH
INTAKE CAMSHAFT POSITION SENSOR LH
EXHAUST CAMSHAFT POSITION SENSOR LH
EXHAUST CAMSHAFT POSITION SENSOR RH
FUEL INJECTOR No. 4
FUEL INJECTOR No. 3
FUEL INJECTOR No. 2
FUEL
PUMP
RELAY
F/B FUSE No. 21
F/B FUSE No. 12
CLUTCH START
SWITCH
CLUTCH SWITCH
F/B FUSE No. 2
F/B FUSE No. 4
M/B FUSE No. 13
PRESSURE SWITCH
A/C RELAY
PURGE CONTROL SOLENOID VALVE 1
PURGE CONTROL SOLENOID VALVE 2
FUEL INJECTOR No. 1
REAR OXYGEN SENSOR
FRONT OXYGEN (A/F) SENSOR
MASS AIR FLOW & INTAKE AIR TEMPERATURE SENSOR
WASTEGATE CONTROL SOLENOID VALVE
FUEL PUMP ASSY
(FUEL PUMP)
MAIN RELAY
FUSE HOLDER
A/F, OXYGEN
SENSOR RELAY
SECONDARY
AIR COMBINATION
VALVE RELAY 2
SECONDARY
AIR COMBINATION
VALVE RELAY 1
M/B
M/B
SECONDARY
AIR PUMP RELAY
STARTER MOTOR
FUEL
GAUGE
SYSTEM
ELECTRONIC THROTTLE
CONTROL RELAY
F/B FUSE No. 7
IG 2 RELAY
MAIN
SBF
M/B FUSE No. 11
BATTERY
FUSE HOLDER
FUEL PUMP CU
KEYLESS ACCESS CM
C3
C13
C15
C12
CRUISE CONTROL SWITCH
STOP LIGHT & BRAKE SWITCH
15WRX_STI_US_EN.book 218 ージ 20  
WI-219
Engine Electrical System
WIRING SYSTEM
WI-44418
6
7
8
9
10
A2
A18
A28
A1
D20
A19
A16
A34
A27
D22
A29
A17
B31
B29
B21
B22
C4
B23
J/C
ELCM
J/C
D31
B30
A24
D8
D2
D3
D17
D25
A3
A6
A23
A5
A14
A7
A15
D9
D12
D10
A25
D11
A26
D1
A4
C2
C35
B14
A32
A31
A22
A21
C34
2
1
3
4
5
B11
B12
C17
C28
I/F
I/F
TFT
D27
C21
B4
ECM
NEUTRAL POSITION
SWITCH 1
VACUUM PUMP
PRESSURE SENSOR
SWITCHING VALVE
ACCELERATOR PEDAL
POSITION SENSOR
CAN
COMMUNICATION
POWER SUPPLY
CIRCUIT
DRIVE CIRCUIT
SPEAKER
MICRO COMPUTER
ENGINE
COOLANT
TEMP.
GAUGE
TACHOM-
ETER
CAN TRANSCEIVER &
RECEIVER
COMBINATION METER
OIL PRESSURE
SWITCH
MAIN FAN RELAY 1
CAN
COMMUNI-
CATION
SUB FAN RELAY
DELIVERY MODE
FUSE
ENGINE GROUND
TUMBLE GENERATOR VALVE ACTUATOR RH
TUMBLE GENERATOR VALVE ACTUATOR LH
CAN
COMMUNICATION
CRUISE CONTROL SWITCH
DATA LINK CONNECTOR
IGNITION COIL
No. 1
IGNITION COIL
No. 2
IGNITION COIL
No. 4
IGNITION COIL
No. 3
KNOCK SENSOR
CRANKSHAFT POSITION SENSOR
DRIVE CIRCUIT
MALFUNCTION
REV.
OIL PRESSURE
INTAKE OIL FLOW CONTROL SOLENOID VALVE RH
EXHAUST OIL FLOW CONTROL SOLENOID VALVE LH
EXHAUST OIL FLOW CONTROL SOLENOID VALVE RH
SECONDARY AIR COMBINATION VALVE RH
SECONDARY AIR COMBINATION VALVE LH
LEAK DIAGNOSIS CONNECTOR 2
LEAK DIAGNOSIS CONNECTOR 1
INTAKE OIL FLOW CONTROL SOLENOID VALVE LH
ENGINE COOLANT TEMPERATURE SENSOR
MANIFOLD ABSOLUTE PRESSURE SENSOR
ELECTRONIC THROTTLE CONTROL
MULTI
SELECT
SWITCH
(SI-DRIVE)
15WRX_STI_US_EN.book 219 ージ 20  
WI-220
Engine Electrical System
WIRING SYSTEM
WI-44419
4a 4a
B220
B135B:
B136C:
B
B
G/R
W/G
G/RG/R
3
5
G/R
B
R/B
R/B
W/G
1
2
R/G B11
B/R B12
C30
Y/B C7
L/O
B35
W
GR/W C12
C13
C3
C15
Y
BR/W
W/G C16
B15
B25
R/W
R/W
B32
Y/B
W/R B34
ECM
A
G/R
REF. TO POWER SUPPLY CIRCUIT [4d]
FB-38
F/B FUSE NO. 12
(IG)
MB-25
M/B FUSE NO. 11
(B)
REF. TO RADIATOR FAN SYSTEM [2a]
FUEL PUMP RELAY
REF. TO CRUISE CONTROL SYSTEM [2b]
REF. TO GND [d]
REF. TO PUSH BUTTON START
SYSTEM [2b] [2c]
REF. TO AIR CONDITIONING SYSTEM [a]
15WRX_STI_US_EN.book 220 ージ 20  
WI-221
Engine Electrical System
WIRING SYSTEM
WI-44420
4b 4b
6
7
5
B135B:
B136C:
R122
R1
B97
R58
R/B
5
6
1
4
L
G/Y
G/R
B/R
6
G/R
10
R/B
8
G
9
LG/R
5
B
7
G/Y
B
B
R/B
R/B
G
G
LG/R
LG/R
B10
LG/R
C33
G
ECM
FUEL LEVEL SENSOR
FUEL PUMP
FUEL PUMP
ASSY
REF. TO GND [g]
FUEL PUMP CU
REF. TO FUEL GAUGE SYSTEM [a]
15WRX_STI_US_EN.book 221 ージ 20  
WI-222
Engine Electrical System
WIRING SYSTEM
8
9
1
2
5
8
WI-44421
i231
B553
i2
R339
R18
R21
R33
AD10
4c 4c
B21
E2
i10
i229
B551
E11
837
3
BR/W20
W/LW/L
40
L32
R33
38B
B
G
1
G/O 3
BR 26
G/L
BR
G/L
BR
G/L
R
B
35
G/O
I/F
TFT
I/F
SPEAKER
DRIVE CIRCUIT
OIL PRESSURE
REV.
CAN TRANSCEIVER &
RECEIVER
MICRO COMPUTER
MALFUNCTION
DRIVE CIRCUIT
POWER SUPPLY
CIRCUIT
OIL PRESSURE SWITCH
MULTI SELECT
SWITCH
(SI-DRIVE)
FB-18
F/B FUSE NO. 7
(B)
FB-12
F/B FUSE NO. 2
(IG)
TACHOM-
ETER
ENGINE
COOLANT
TEMP.
GAUGE
COMBINATION METER
REF. TO GND [e]
REF. TO CAN COMMUNICATION SYSTEM [b]
I
S#
S
15WRX_STI_US_EN.book 222 ージ 20  
WI-223
Engine Electrical System
WIRING SYSTEM
CLUTCH START
SWITCH
WI-44422
4d 4d
B14
B:
B135
C:
B136
2
3
5
1
B/W
W/B
RC17
B/WC27
B/RB26
GR
LG
A10
LC28
1
B225
W/L
B/W
LG LG
W/L
B/R
W/B
ST-2
STARTER CUT
RELAY
A:
B572
1
2
T2 T12
5
T9 B128T12 T2
2
B128 T9
C
LLG/YBG/WC35
1
B576
B575
B106
2
1
8
22
W/B
B/W
10A
B550
ST-1
F/B FUSE NO. 21
(ST)
REF. TO CAN COMMUNICATION SYSTEM [a]
BATTERY
STARTER RELAY 1
STARTER MOTOR
NEUTRAL POSITION
SWITCH 1
FUSE HOLDER
ECM
KEYLESS ACCESS CM
15WRX_STI_US_EN.book 223 ージ 20  
WI-224
Engine Electrical System
WIRING SYSTEM
WI-44423
4e 4e
B550
B220
B225
B225
B:
B135
C:
B136
D:
B137
15A
15A
D
W/R
W/L
16 W
R19
W/Y
12
13
LG
Y/B
10
11
20
18LG
B/R
22
21
R/L
B/R
Y/B
Y/B
L/R
Y/B 16
17
14
L
4 W/L
15
W
R
W
W
E
F
L18
LGB13
Y/B
C1 Y/B
D7
L/RB7
R/LB17
15A
Y/B
G
2 W/R
5 W/Y
MB-23
SBF-7
(B)
MB-24
SBF-7
(B)
MB-22
SBF-5
(B)
ECM
ELECTRONIC THROTTLE
CONTROL RELAY
A/F, OXYGEN
SENSOR RELAY
MAIN RELAY
FUSE HOLDER
15WRX_STI_US_EN.book 224 ージ 20  
WI-225
Engine Electrical System
WIRING SYSTEM
WI-44424
4f 4f
F27
B40
B:
F109
C:
B360
C:
B136
B:
B135
H
I
B107
C34
W
G/Y
C2W
B9R/Y
C2
B20 B/Y
C10
B6
B/Y
B/Y
P
P
B/Y
P8
9
R6
L14
B/W5
B/Y
B/Y
4
W16
B14V/RV/R7
G/Y8
B/W
P
R/Y
G/Y
2
1
ECM
REF. TO GND [c]
CLUTCH SWITCH
REF. TO CAN COMMUNICATION SYSTEM [b]
DATA LINK
CONNECTOR
MB-27
M/B FUSE NO. 13
(B)
FB-32
F/B FUSE NO. 4
(IG)
DELIVERY
MODE FUSE
THROUGH
JOINT CONNECTOR
15WRX_STI_US_EN.book 225 ージ 20  
WI-226
Engine Electrical System
WIRING SYSTEM
WI-44425
4g 4g
B135
B:
B136
C:
B137
D:
B83
6
8
1
4
3
7
B315
B97 R1
R400
B3
J/C
*
1
J
K
G
18
5
17
20
15
16
19
*
1
*
1
*
1
*
1
*
1
BR/W
W/L
Y/G
S
BR/W
L/Y
G/O
BR/W
B4
B/G
C11
W
C22
OB31
Y/WB30
G2
L/Y 1
W6
L5
G/B 4
O3
ELCM
G/B
B21
LB29
WB23
SC10
Y/L
C31
Y/BY/B 3
Y/R 2
Y/L 1
W5
B/G 4
L/YB22
Y/W
G/O
G
Y/R
Y/R
Y/LY/B
LGD27
L/O
GR
Y/L
L/O
LG
L/O
C21
Y/R
ECM
SWITCHING
VALVE
MASS AIR FLOW &
INTAKE AIR TEMPERATURE
SENSOR
ACCELERATOR PEDAL
POSITION SENSOR
PRESSURE
SENSOR
VACUUM PUMP
: TERMINAL No. OPTIONAL ARRANGEMENT
15WRX_STI_US_EN.book 226 ージ 20  
WI-227
Engine Electrical System
WIRING SYSTEM
*
1
WI-44426
4h 4h
B134
A:
1
2
4
3
B19 T5
B21 E2
B379
T6
D
K
2
1
4
3
E38
2
1
22
21
E37
2
1
32
33
B135
B:
B136
C:
W/RC5
W/RC6
WB6
WC20
WC19
B
W/R
W
B
*
1
S
*
1
S
S
S
*
1
R/B
C18
R/BC9
Y/R
W
B/RB/R
B/R
W
L
W/B
Y/R
W
L
W/B
Y/R
W
4
1
2
3
G/LA17
Y/R
G/RA27
W/B
G/B
G/R
G/WA34 G/W G/B
W/B
GA16
Y/B
L/B
G
G/L
Y/B
L/B
E66
1
2
43
42
L/RA14
L/WA5
GR
L/Y
L/W
L/R
GR
L/Y
E63
1
2
17
7
L/BA15
R/WA7
G/R
BR/Y
R/W
L/B
G/R
BR/Y
ECM
B1
J/C
INTAKE OIL FLOW CONTROL
SOLENOID VALVE LH
EXHAUST OIL FLOW CONTROL
SOLENOID VALVE LH
EXHAUST OIL FLOW CONTROL
SOLENOID VALVE RH
INTAKE OIL FLOW CONTROL
SOLENOID VALVE RH
FRONT OXYGEN (A/F)
SENSOR
REAR OXYGEN
SENSOR
: TERMINAL No. OPTIONAL ARRANGEMENT
15WRX_STI_US_EN.book 227 ージ 20  
WI-228
Engine Electrical System
WIRING SYSTEM
WI-44427
4i 4i
E10
E57
E14
E2
B21
E21
E8
D:
B137
A:
B134
L
Q
P
M
N
12
23
38
39
6
28
25
24
4
3
14
D25
B
D17
W
D31 S
D8 S
A28 L
A29
A19 BR/W
A18 W
2
1
4
1
D2
W
G
L
1
W
2
B
5R
W
2
B/L
W/R
W
W/R
Y/G
Y/G
Y/G
W
A2 G/Y
Y/G
A1 W/B
BR/WD22
3
2
R
B/L
Y/G
1
2
B/L
GR
S
G
L
B
W
W
L
W
BR/W
G/Y
W/B
GR
W
B
W
6
3B/L
Y/G
B/L
BR/W
R
1O
Y/WD20
Y/W
O
B/L
O
B/L
R
R
ECM
ENGINE COOLANT
TEMPERATURE
SENSOR
MANIFOLD ABSOLUTE
PRESSURE SENSOR
KNOCK SENSOR
ELECTRONIC
THROTTLE CONTROL
CRANKSHAFT POSITION
SENSOR
15WRX_STI_US_EN.book 228 ージ 20  
WI-229
Engine Electrical System
WIRING SYSTEM
WI-44428
D:
B137
A:
B134
4j 4j
E64
E52
E4
E5
E16
E6
E17
E19
R
E2
B21
44
50
48
53
54
11
51
18
52
F
V
D15
R/G
D6
P
A10
P/L
A11
P/B
A12
P/G
A13
B/W 1
W2
B/W
1
G/W 2
B/W 1
L/W 2
B/W 1
W2
B/W
B/W
1
BR/R 2
L/W
G/W
W
G/W
L/W
W
BR/R
G/W 2
B/W 1
L/W 2
A33
Y/R
Y/B Y/B B/W 1B/W
P/B
D28
R/Y 1
R/Y
ECM
POWER STEERING
OIL PRESSURE SWITCH
FUEL INJECTOR
No. 4
FUEL INJECTOR
No. 3
FUEL INJECTOR
No. 2
FUEL INJECTOR
No. 1
PURGE CONTROL
SOLENOID VALVE 1
WASTEGATE
CONTROL
SOLENOID
VALVE
PURGE CONTROL
SOLENOID VALVE 2
15WRX_STI_US_EN.book 229 ージ 20  
WI-230
Engine Electrical System
WIRING SYSTEM
WI-44429
4k 4k
D:
B137
A:
B134
E51
E55
E35
E36
R
P
M
E2 B21
30
29
27
19
8
16
13
5
2
4
5
1
L
Y/R
Y/L
4
5
W/L
P/L
2
3
W/L
G/Y
1
B
1
2
G/R
B
3
W/L
D16
D30
A25
A26
D24
R/BW/L
R/LP/L
R/G
R/Y
L
Y/L
G/Y G/W
W/L Y/B
G/R G/O
E65
26
1
2
G/W
B
3
W/L
G/W BR/Y D29
E62
15
1
2
G/B
B
3
W/L
G/B Y/B D23
A23
A24
W/L
D10
B/W
B/L
R
Y/R
1
W/R
D11
W/RW/R
2
B/L
2
B/L
3
R
3
R
ECM
INTAKE CAMSHAFT
POSITION SENSOR RH
EXHAUST CAMSHAFT
POSITION SENSOR LH
EXHAUST CAMSHAFT
POSITION SENSOR RH
INTAKE CAMSHAFT
POSITION SENSOR LH
TUMBLE GENERATOR
VALVE ACTUATOR RH
TUMBLE GENERATOR
VALVE ACTUATOR LH
15WRX_STI_US_EN.book 230 ージ 20  
WI-231
Engine Electrical System
WIRING SYSTEM
WI-44430
4l 4l
A:
B134
D:
B137
E31
E32
E33
E34
E2
B21
A
20
9
49
31
10
G/R G/R
G/Y
1
B2
G/Y
R
3R
L/Y
1
B/W
2
R3
L/Y
BR/Y 1
B
2
R3
BR/Y
Y
1
B/W
B/W
2
R
3
Y
A22
A31
A32
A21
Y/G
W/G
W/L
E80
E87
45
L/R
2
W
1
W
1
B/R
B/R
2
L/R
D12 Y/R
W/R
ECM
S
B
T
U
IGNITION COIL No. 4
LEAK DIAGNOSIS
CONNECTOR 1
LEAK DIAGNOSIS
CONNECTOR 2
IGNITION COIL No. 3
IGNITION COIL No. 2
IGNITION COIL No. 1
15WRX_STI_US_EN.book 231 ージ 20  
WI-232
Engine Electrical System
WIRING SYSTEM
WI-44431
4m 4m
F9
F9
F9
F11
6W
5
16
15 W
A5 R/B
A18 9RR
A8 R/G
B4 R/G
B12 R
B2 R/B
B8 R/B
B20 R
B27 R/G
W
W
B:
B135
A:
F37
B:
B143
F9
10A
60A
R
L
Y/L
L8
Y/LY/L 10
7
2
4
R/B
1Y/L
R3
Y/B
Y/B 12
R/G 13
14
W11
W2
B1
V
W
X
Y
MB-34
MAIN SBF
(B)
MB-33
MAIN SBF
(B)
RELAY HOLDER
M/B
ECM
SECONDARY
AIR COMBINATION
VALVE RELAY 1
SECONDARY
AIR COMBINATION
VALVE RELAY 2
SECONDARY
AIR PUMP
RELAY
SECONDARY
AIR PUMP
GP
15WRX_STI_US_EN.book 232 ージ 20  
WI-233
Engine Electrical System
WIRING SYSTEM
WI-44432
4n 4n
A16L
R
Y/B
B13
B20
2 BR/R
1W
D:
B137
A:
F37
B:
B143
W
Z
3 B/L
2 R/Y R/Y D9L/W
4W W
a
1R
6BR BR
B21
E2
46
W
A20Y/B
Y
A13Y/L
X
A17R
L
Y/B
Y/L
R
V
B10Y/B
B14L
B21
E2
1
BR/R
Y/B
E
R
N
B/L
O
E40
L/W
E41
47
M/B
SECONDARY
AIR COMBINATION
VALVE RH
SECONDARY
AIR COMBINATION
VALVE LH
ECM
15WRX_STI_US_EN.book 233 ージ 20  
WI-234
Engine Electrical System
WIRING SYSTEM
WI-44433
4o 4o
B122
C:
B136
D:
B137
A:
B134
*
1
*
1
*
1
*
1
*
1
*
1
*
1
*
1
J/C
E2
B21
H
C
L
J
T
Z
I
34
35
36
40
B/W
B/Y
B/Y
B/Y
B
W
B/WB/Y
B/W B/Y
B/Y
B/Y
L
B/L
S
B/Y
B/L
B/W
B
Q
Y/G
Y/G
S
B/W
B/W
U
B/R
B/R
W
a
WW
S
B/R
B/L
B/W
B/R
B/L
B/Y
D1
A3
A6
C4
A4
B/YD3
GE-3
ECM
REF. TO CRUISE CONTROL
SYSTEM [2d]
: TERMINAL No. OPTIONAL ARRANGEMENT
15WRX_STI_US_EN.book 234 ージ 20  
WI-235
Engine Electrical System
WIRING SYSTEM
LIST OF CONNECTORS
RELAY HOLDER
FUSE HOLDER
4p 4p
456
123
123
4
5
1
12
34
123456789
10 11
12 13 14 15 16 17 18 19 20 21 22
23 24 25 26 27 28 29 30 31 32 33
34 35
42 43
36 37 38 39
48 49 50 51 52 53 54
40 41
44 45 46 47
1
9
8
16
2
10
7
15
3
11
6
14
4
12
5
13
89
19 20
1234 567
10 11 12 13 14 15 16 17 18
2
1
78
5
6
34
21
123
456
18
2719 20 21 22
23
26
24
25
28 29 3332 3430 31
98
15
1413121110
17
16
1234567
5672134
29
10 11 12 13 14 15
2524
16
30
98
17 18 19
20
28
21 22 23
3231
26 27
33 34 35
19
18
21
20
2322 24 25 26
17
1
23
4
56
27
28 29 30
31 32 33 34 35
798
151413121110 16
19
18
20 21
22
23
26
24
25
27
28 29
30 31
98
15
1413121110
17
16
1234567
10 11
12
13
14 15
16
18
19 21 22
20
17
24
5
3
17
9
8
6
32 33
34
35
28262423
25
27
29
30
31
36 37
38
40
41 43 44
42
39
56341
2
123 4567
89
10 11 12 13 14 15 16
21
43
101
242322 272625212019
5
14
13
18
432
17
7
16
698
15
11 12
11 12
34
13 14
56
15 16
78
17 18
10
9
12
123
456789
10 11
12 13 14 15 16 17 18 19 20 21 22
12
21
12
12
21
1
123
2
1
3
12
E21
213
WI-44434
B21 (B)
B220 B225
B40
(B)
B3
(B)
B1
B315
(B)
E10
(GR)
E19
E62
(GR)
E63
(L)
(
B
)
E4
(
B
)
E52
E5
E16
E6
E17
(GR) (GR)
(GR) (GR)
E36
E35
(GR)
(GR)
(
L
)
E38
E37
(L)
B14
(B)
B19
(GR)
B360
C:
(GR)
B572
A:
B379
(GR)
B575
(
GR
)
E14
(
B
)
E8
E34
(GR)
E33
(GR)
E32
(GR)
E31
(GR)
B97
(GR)
B122
(GR)
B128
B137
D:
B143
B:
B136C:
B135
B:
B134A:
B106
B83
(B)
B550
E65
(GR)
E66
(L)
B107
(L)
12
(B)
15WRX_STI_US_EN.book 235 ージ 20  
WI-236
Engine Electrical System
WIRING SYSTEM
LIST OF CONNECTORS
RELAY HOLDER
RELAY HOLDER
4q 4q
12
12
5
11
15
1
2
9
10
34 7
12 13
8
6
16
14
12
24
23
25
12 13 14
15
16
26
2221
20
19
1817
10 11
2
4
5
13
7698
1234
56789
10 11 12 13 14 15 16 17 18 19 20
3412 89
10 11
12 13 14 15 16 17 18 19 20 21 22 23 24
567
12345 6789
10 11 12 13 14 15 16 17 18 19 20
11 12
9
10
7856341
2
15 1613 14 19
18
20
21 22 23 24 26
25
27 28 29 30 31 32 33 34 35 36 37 38 39 40
17
12 345
6789
10 11 12
12
34
56789
10
12
34
56
1234
5678
12
123
456
12
45
213
321654
R21
(B)
12 345
6789
10 11 12
WI-44435
E64
(L)
i2
i229
i231
R33
R58
(GR)
R122
(GR)
T12
(BR)
R400
E80
(GR)
E87
(GR)
F27
F9
F11
i10
F109
B:
F37
A:
21
43
(GR)
T6
E57
(B)
(
B
)
E40
(
B
)
E41
E55
(
GR
)
E51
(
GR
)
15WRX_STI_US_EN.book 236 ージ 20